3-D Printing of Guns: The Future of Gun Control?

So this whole gun control debate so far has been focused on regulating the sale/purchase/trade of firearms. Until now, the idea of people manufacturing their own hasn't really factored into the policy discussion. Saw this rather scary documentary though (came out a few months back) about this creepy guy that got me thinking.

It appears the technology for people to manufacture guns and magazines for them at home from high tensile polymer plastic is here today, even though still in its infancy. Even those without a $4,000 3-D printer (which is capable of printing a lot of things other than guns) you still can download a gun schematic off the internet, design and create the molds, and then assemble the parts - would take a hella lot more time and likely lower quality, but still possible. But if this technology becomes more cost-effective and accessible in the future, it'd be interesting to see what kind of measures the government could take to regulate it and how gun control would work going forward. Would be interested to hear youse guys thoughts on this (especially those here who own guns and are knowledgeable about their production and operation). Thanks.

A co-worker of mine sent me the link regarding this story. I'm glad to know that I wasn't the only one who had a strange vibe from this guy. I saw a related video of him being interviewed by Glenn Beck. At least Glenn had the good sense to pick up on the flimsy answers this guy was giving when Glenn was trying to get some straightforward responses.